The print, titled "ELEKTRISCHE TELEGRAPHEN. I." (Electric Telegraphs. I.), depicts several types of telegraphs from the 19th century, including:
A needle telegraph (Nadeltelegraph).
Pointer telegraphs by Siemens & Halske (Zeigertelegraph von Siemens & Halske).
Pointer telegraphs by Breguet (Zeigertelegraph von Breguet).
A galvanoscope used by German state telegraphs (Galvanoskop bei den deutschen Reichstelegraphien).
Nadeltelegraph (Needle Telegraph): An early form of telegraph that used magnetic needles to point to letters on a board.
Spiegel- und Sprechgalvanometer (Mirror and Speaking Galvanometer): Devices used to detect and measure electric currents.
Zeigertelegraph von Siemens & Halske (Pointer Telegraph by Siemens & Halske): Werner von Siemens, a co-founder of the company, invented an improved pointer telegraph in 1847 that was electrically synchronized.
Gilberts Nadelklopfer (Gilbert's Needle Tapper): A type of telegraph instrument.
Zeigertelegraph von Breguet (Pointer Telegraph by Breguet): Louis-François-Clément Breguet was a French physicist who developed various electrical telegraph systems, including a needle telegraph.
Zeigertelegraph von Wheatstone (Pointer Telegraph by Wheatstone): Charles Wheatstone, an English scientist, collaborated with William Cooke to create one of the first commercially successful electric telegraph systems, which used needles to point to letters.
Galvanoskop bei den deutschen Reichstelegraphien (Galvanoscope for the German Imperial Telegraphs): A device for detecting the direction of a small electric current